"Final Fantasy: Villains" by Ryuuza

Villains from each of the numbered Final Fantasy games so far - and Tactics, just because. X)
It was originally going to be a 25th anniversary thing, but life got in the way and the first version was... not good. So I started it from scratch and added the hooded guy from the FFXV trailers so it wouldn't be out of date in a year's time.
From top to bottom and left to right:
FFVII - Safer/ Seraph Sephiroth
FFXI - Shadow Lord
Tactics - Wiegraf, FFXIV - Gaius, FFXV - as yet unnamed hooded guy, FFIII - Cloud of Darkness
FFXII - Vayne, FFV - Ex-Death
FFVIII - Ultimecia
FFXIII - Cid Raines, FFVI - Kefka, FFIX - Trance Kuja, FFII - Mateus/ Emperor of Palamecia
FFX - Seymour, FF - Garland, FFIV - Golbez

I'm also reworking my Heroes and Villains pieces, which hopefully won't take as long!